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KSM90PSER0 KitchenAid Mixer - Instructions

All installation instructions for KSM90PSER0 parts

These instructions have been submitted by other PartSelect customers and can help guide you through the mixer repair with useful information like difficulty of repair, length of repair, tools needed, and more.

1. Removed the mixer from the base by removeing the pivot pin at the mixer base support. 2. removed the retainer ring from the housing. 3. removed the pin from the shaft. 4. removed 5 philips machine screws from the round base. 5. removed the round base from the mixer housing. 6. removed the o-ring from the shaft. 7. removed the shaft and large worm/pinion gear from the shaft. 8. pressed out the pinion drive gear from the mixer. The reverse operation repaired the mixer to new condition.

Beater was peeling and chipped; thumb screw was worn & loose to the point it would fall out

Broken worm gear

Knob fell out of the front of the mixer into the bowl and jammed the beater. This caused the motor to strip the plastic worm gear. Open unit to investigate and found about 4 teeth missing out of the worm gear. Ordered a replacement. Installed the new gear once received in about 30 minutes. Wife is now happy again. Just need to make sure you pack enough gease into the new gear before reassembling the unit.

mixer would not turn on

removed one screw from back cover, loosened two screws holding speed control plate, removed one wire at a time from old unit to new, screwed two top screws back on mixer,plug mixer back in, adjust speed control screws until I reached correct speed, put back cover back on

Opened beater , removed grease , took bearing off , removed alignment pins ,pulled shaft and pinion out , replaced parts , lubricated with new grease , assembled the whole drive . do not like the plastic gear or the clearance once assembled has a lot of slop for this type of drive .

worm gear had broken tooth and gear was loose on sprocket

I dismantled the machine to find the problem and to see what part I needed. Than when I ordered the part I saw the video of how to do it. If I had seen the video before I dismantled, I would have save a few steps. The video was very complete and accurate even it being an older model

My wife was complaining of a loud grinding noise.

I replaced the brushes. I didn't realize that I've put one of them wrong. Reminder for next time the brushes have to touch the rotor of the motor. It took me a little bit to understand but the brushes can go in and not touch the rotor. It works very quietly now. Thank you PartSelect for your infos and knowledge.

Task went EZ,I have two with bad transmission and with fixing them I found out the grease in case housing was bad like wax. So I'm going to check out my third mixer and replace old grease in that one. your part scrimatics are great thanks.

Stripped worm follower gear.

Watched the video. Ordered the parts. Watched the video again. Replaced the worm follower gear and bearings on the worm gear. Added grease. Installed new gear housing. Put it all back together and tested. Works like new. Now I get cakes and goodies again and have a happy wife who thinks I'm super handyman. Thanks

Worm gear was bad

Order part through parts select. it only took 3 days to receive part. The mixer was very easy to take apart and to replace the gear. it was back together in about 20 min. The video from kitchen aid to repair the unit is awsome. Thanks